// API
|
module.exports = state;
|
|
/**
|
* Creates initial state object
|
* for iteration over list
|
*
|
* @param {array|object} list - list to iterate over
|
* @param {function|null} sortMethod - function to use for keys sort,
|
* or `null` to keep them as is
|
* @returns {object} - initial state object
|
*/
|
function state(list, sortMethod)
|
{
|
var isNamedList = !Array.isArray(list)
|
, initState =
|
{
|
index : 0,
|
keyedList: isNamedList || sortMethod ? Object.keys(list) : null,
|
jobs : {},
|
results : isNamedList ? {} : [],
|
size : isNamedList ? Object.keys(list).length : list.length
|
}
|
;
|
|
if (sortMethod)
|
{
|
// sort array keys based on it's values
|
// sort object's keys just on own merit
|
initState.keyedList.sort(isNamedList ? sortMethod : function(a, b)
|
{
|
return sortMethod(list[a], list[b]);
|
});
|
}
|
|
return initState;
|
}
|
